diff --git a/overlays/kluctl/default.nix b/overlays/kluctl/default.nix
index f994391..45a1fe2 100644
--- a/overlays/kluctl/default.nix
+++ b/overlays/kluctl/default.nix
@@ -4,6 +4,7 @@
   kluctl = prev.kluctl.override {
     buildGoModule = previousArgs: let self = prev.buildGoModule (previousArgs // {
       version = "2.25.0";
+      vendorHash = "sha256-TckT39wQn4dclcYSfxootv1Lw5+iYxY6/wwdUc1+Z6s=";
       src = prev.fetchFromGitHub {
         owner = "kluctl";
         repo = "kluctl";